The data on revenue of associations also comprise data on association branches and youth councils, and data on institutes comprise data on religious communities having the humanitarian organisation status. The data exclude the associations, institutes and foundations that have been established by the Republic of Slovenia, municipalities or other public sector entities.

In recent years, revenue of non-governmental organisations was growing despite the economic crisis each year until 2020, when for the first time it was lower than the year before. Revenue of associations was lower than the year before in 2011 and 2013, but it has been growing since and has exceeded the pre-crisis amount in 2016. In 2018 it increased by 3.04 %, in 2019 by 6.63% and in 2020 decreased for more than 15%. Institutes only suffered a decrease in revenue in 2012, whereas in 2013 their revenue was already higher than before the crisis. Revenue of foundations was lower than the year before in 2011 and 2014, but was again higher than before the crisis in 2015. In 2016 and 2017, foundations suffered another decrease, their revenue sinking below the level of 2009. Only in 2018 and 2019 it again increased over the level before the crisis. In 2020 foundations suffered a decrease of more than 28%.

In 2020, the non-governmental sector generated € 894 million in revenue. The economic power of the non-governmental sector for 2020 equals:

• 169 % of Slovenian agriculture, forestry and fishery combined (based on data gathered by the statistical office, the sector generated € 530.2 million in revenue)
• 104 % of Slovenian immovable property activity (855.8 million)
• 95 % of Slovenian culture, sports and gambling (936.6 million)
• 61 % of Slovenian food-service activities (1,464.3 million)
• 17 % of Slovenian insurance industry (5,362.2 million)
• 14% of Slovenian construction (6,337.4 million)

More than two thirds of all non-governmental organisations’ revenue is generated by associations, followed by institutes and foundations. Although representing only 12,49 % of all non-governmental organisations, institutes generate 36,78 % of all revenue. The high share of revenue generated by associations is reflected in the fact that institutes employ more than a half of the persons working in the non-governmental sector.

When relating the average revenue of a non-governmental organisation to its form, the revenue is highest in case of institutes, amounting to just over € 98,500. The average revenue of foundations and associations is considerably lower, a foundation generating just over € 35,100 in average revenue, and an association slightly more than € 24,000. The average revenue of a non-governmental organisation amounts to € 33,455.41.

Statistically speaking, each non-governmental organisation on average generates slightly over € 33,400 in revenue annually, but the actual distribution of revenue is very much different. There were 19,30 % of non-governmental organisations that generated no revenue in 2020, and an additional 39,97 % that generated less than € 5,000. Only 8,98 % of non-governmental organisations generated more than € 50,000 in revenue.